Given the expression

The expression that is equivalent to the given expression is given by:
I got a different answer..
and i don't see it as one of your choices, also your question is confusing since you're repeating it .-.
But anyways i got
C=x+9, c+x=99, c=99-x
So we have two equations equal to c, c=x+9 and c=99-x, since c=c:
x+9=99-x
2x+9=99
2x=90
x=45, and since c=x+9, c=54
So Charlie weighs 54 kg and his brother weighs 45 kg.
ANSWER
3
EXPLANATION
The given polynomial is

The terms of the polynomial are:
First term:

Second term:

Third term:

Therefore the given polynomial has 3 terms.
Answer: In 16 Minutes the ladder will hit the ground.
Step-by-step explanation:
50 is at the top of the building.
the base is 30 feet from the building. If the top of the ladder is falling 3 ft every minute in 16 minutes it will hit the ground.
Hope it helps